(Although) the term "corrosion" applies mostly to metals and particularly to (their reaction)to oxygen, all (material) are subje

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问题 (Although) the term "corrosion" applies mostly to metals and particularly to (their reaction)to oxygen, all (material) are subject to (surface deterioration)

选项 A、Although
B、their reaction
C、material
D、surface deterioration

答案C

解析
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